.nut-navbar {
  padding-top: env(safe-area-inset-top);
  padding-top: constant(safe-area-inset-top);
  /* 兼容旧版 iOS */
  box-sizing: content-box;
}
.nut-navbar--fixed {
  top: env(safe-area-inset-top);
  top: constant(safe-area-inset-top);
}
